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WO2002100531A1 - Systeme de sechage aux uv pour substances thermosensibles - Google Patents

Systeme de sechage aux uv pour substances thermosensibles Download PDF

Info

Publication number
WO2002100531A1
WO2002100531A1 PCT/US2002/017911 US0217911W WO02100531A1 WO 2002100531 A1 WO2002100531 A1 WO 2002100531A1 US 0217911 W US0217911 W US 0217911W WO 02100531 A1 WO02100531 A1 WO 02100531A1
Authority
WO
WIPO (PCT)
Prior art keywords
shade member
light
light source
target substance
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2002/017911
Other languages
English (en)
Inventor
Tom Becker
Allen P. Blacker, Jr.
Simon N. Whittle
Kevin Mckay
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aetek UV Systems
Original Assignee
Aetek UV Systems
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aetek UV Systems filed Critical Aetek UV Systems
Publication of WO2002100531A1 publication Critical patent/WO2002100531A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/0033—Heating devices using lamps
    • H05B3/0038—Heating devices using lamps for industrial applications

Definitions

  • the present invention relates to systems and processes for ultraviolet (UV) curing of materials.
  • the present invention relates to a device and process that allows for UV curing of materials at a lower substrate temperature than that allowed by conventional systems and processes.
  • UV curing of materials such as, for example, photopolymerizable organic materials
  • a problem that arises is that the UV source used in the process may generate a large amount of heat, which arises from the UV light itself as well as from non-useful light of other frequencies, including infrared (IR) radiation, which can adversely affect the substance being cured. Excess temperatures may then damage or destroy heat-sensitive materials, such as the substance being cured or a support material (such as paper, plastic, foil, etc.) on which the substance is being cured.
  • IR infrared
  • U.S. Patent No. 4,644,899 to Glaus discloses a curing device wherein rays from a light source impinge on a mirror that is partially transmitting and set at an angle with respect to the axis of the light beam, so that IR light rays pass directly through the mirror to a cooling system and UV light rays are deflected towards the substrate to be cured.
  • U.S. Patent No. 4,048,490 to Troue discloses an apparatus having an arrangement of dichroic filter surfaces.
  • U.S. Patent No. 4,563,589 to Scheffer discloses an ultraviolet curing lamp device that includes a blocker tube located between the ultraviolet light source and an ultraviolet light permeable quartz plate window through which the ultraviolet light exits.
  • the blocker tube reflects ultraviolet, visible and infrared light.
  • the present invention is a UV curing system and process for curing a target substance which overcomes the aforementioned problems of the prior art.
  • the UV curing system includes a light source, which produces useful UV light, as well as other unwanted wavelengths of light (each of which can produce unwanted heat) , a shade member having a lamp-side surface which performs dichroically -- absorbing heat producing light that is not within the range of useful UV light wavelengths, and reflecting useful UV light wavelengths, and a housing having another dichroic (UV reflect, IR pass) coated surface.
  • useful UV light refers to UV light of a wavelength that cures the target substance .
  • the shade member is situated between the light source and the target substance so that some, or all of the light from the light source does not directly strike the target substance.
  • the housing is situated on the opposite side of the light source from the target and partially encloses the light source.
  • the shape of the reflecting surface of the housing, the shape of the shade member, and the location of the internal reflecting surface of the housing, the shade member and the light source with respect to each other are selected so that (1) at least some of the UV light that leaves the light source and travels in a direction in which it does not strike the shade member strikes the dichroic reflecting surface of the housing and is reflected onto the target substance and (2) at least some of the UV light that leaves the light source and travels in a direction in which it strikes the shade member is reflected from the lamp-side of the shade member onto the dichroic, reflecting surface of the housing, from which it is reflected onto the target substance.
  • the materials used to fabricate the shade member prevent the target-side surface of the shade member from getting hot and re-radiating heat energy to the target substance, and the physical presence of the shade blocks all, or most, direct illumination (light/heat) from the lamp, the target surface is thereby kept cooler during a curing process than it would otherwise have been without the presence of the shade member .
  • the shade member possesses thermal insulating properties created by certain materials such as ceramic or quartz, which may or may not be coated with one of a variety of coatings applied to increase the shade's lamp- side to target-side temperature ratio.
  • a ceramic material which may be used is alumina.
  • the shade member may have at least one internal conduit that may be filled with a heat conducting material that conducts heat to heat sinks which are not located near the target substance.
  • a metallic conductor may also serve to provide mechanical support for the material from which the shade is fabricated.
  • the invention further relates to methods of curing UV- curable substances by providing a UV curing system as described above and activating the UV light source so that the UV-curable substance is exposed to UV light from the UV curing system.
  • Fig. 1 illustrates a schematic cross-sectional view of a UV curing system in accordance with one embodiment of the present invention.
  • Fig. 2A - 2F illustrate schematic cross-sectional view of various configurations for the shade member.
  • Fig. 3 illustrates a schematic cross-sectional view of a UV curing system in accordance with another embodiment of the present invention.
  • Fig. 1 illustrates a first embodiment of a UV curing system 10 for curing a target substance 12.
  • the system includes a light source 24 that produces UV light and undesirable IR light.
  • the UV light source 24 may be, without limitation, a microwave excited light source or an arc excited UV source each of conventional construction.
  • a shade member 16 is situated between the light source 24 and the target substance 12 so that light from the light source does not directly strike the target substance or is at least partially blocked from striking the target substance.
  • the shade member 16 thus forms a shade that shields the target substance from all, or most, direct beams of light from the lamp.
  • the shade member 16 has a lamp-side surface 18 (that is, a surface that faces the light source) that reflects UV and which can act to insulate the target-side surface from lamp- side temperatures.
  • a housing 26 having an internal dichroic reflecting surface, the shape of the shade member, the materials from which the shade member is fabricated, the location of the internal reflecting surface of the housing, the shade member and the light source with respect to each other are selected so that (1) at least some of the UV light (shown as 30) that leaves the light source 24 and travels in a direction in which it does not strike the shade member strikes the internal dichroic reflecting surface 28 of the housing 26 and is reflected onto the target substance 12. At least some of the UV light (shown as 32 that leaves the light source 24 and travels in a direction in which it strikes the shade member 16 is reflected from the lamp-side surface 18 of the shade member 16 onto the internal dichroic reflecting surface 28 of the housing 26, from which it is reflected onto the target substance 12.
  • Non-useful light that strikes the shade member 16 is attenuated in several ways, while useful UV light is minimally attenuated before arriving at the target substance. Multiple reflections of UV light may occur before the UV light reaches the target substance.
  • the shade member is made of a material that is a very good thermal insulator so that during the operation of the UV curing system, the target side of the shade member remains cooler than the lamp side of the shade member.
  • the shade member may contain one or more internal conduits 20 that are fluidly connected with a source of cooling fluid, such as air, so that the shade member is kept cool by the circulation of cooling fluid through the one or more internal conduits.
  • the curing system of the first embodiment of the present invention may be created by mounting a shade member into a conventional UV curing system having a UV light source and a housing.
  • the invention is particularly suitable for UV curing systems that are capable of producing an excess of UV light, that is, systems which, in an unaltered state, produce an amount of UV light that is greater than what is needed for high speed curing.
  • the curing system may also be constructed by designing the size, shape and reflectivity of the housing and the shade member and designing the location of light source, shade member, housing and target substance so as to maximize the amount of UV light that strikes the target substance and minimize the amount of IR light that strikes the target substance.
  • either the internal reflecting surface 28 of the housing 26 or the outer surface 18 of the shade member 16, or both, may be made of a dichroic material.
  • the shade member 16 may have various shapes, illustrated, but not limited by, the shapes shown in Figures 2A - 2F. In particular, the surface of the shade member facing the light source may be flat, concave or convex.
  • the housing 26 preferably has an elliptical shape.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

Ce système de séchage aux UV (10) est constitué d'une source de lumière (24), d'un écran (16) dont la face vers la lampe (18) renvoie la lumière et fournit une isolation thermique par rapport au substrat visé (12), et d'un logement (26) à la surface interne (28) réfléchissante. Cette source de lumière vient entre l'écran (16) et le logement (26). La forme de la surface réfléchissante (28) et de l'écran (16), ainsi que la disposition de la surface réfléchissante (28) de l'écran (16) et de la source de lumière (24) les uns par rapport aux autres sont choisies de façon qu'au moins une partie de la lumière UV émise par la source de lumière (24) soit renvoyée sur le substrat visé (12) après avoir touché l'écran (16) et/ou la surface réfléchissante (28), la lumière non utile émise par la source de lumière (24) ayant été de la sorte atténuée, ce qui permet de garder pendant le séchage le substrat visé (12) à une température inférieure à celle qui serait la sienne s'il n'y avait pas d'écran (16).
PCT/US2002/017911 2001-06-08 2002-06-10 Systeme de sechage aux uv pour substances thermosensibles Ceased WO2002100531A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US29647601P 2001-06-08 2001-06-08
US60/296,476 2001-06-08
US10/164,620 2002-06-08
US10/164,620 US6599585B2 (en) 2001-06-08 2002-06-10 UV curing system for heat sensitive substances and process

Publications (1)

Publication Number Publication Date
WO2002100531A1 true WO2002100531A1 (fr) 2002-12-19

Family

ID=26860710

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/017911 Ceased WO2002100531A1 (fr) 2001-06-08 2002-06-10 Systeme de sechage aux uv pour substances thermosensibles

Country Status (2)

Country Link
US (1) US6599585B2 (fr)
WO (1) WO2002100531A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106000827A (zh) * 2016-06-08 2016-10-12 宜兴市富胜机械有限公司 一种单灯箱uv固化机

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6755518B2 (en) * 2001-08-30 2004-06-29 L&P Property Management Company Method and apparatus for ink jet printing on rigid panels
DE10215024A1 (de) * 2002-04-03 2003-10-30 Juergen Welle UV-Strahler
DE102004017047B4 (de) * 2004-04-02 2007-05-16 Hoenle Ag Dr Verfahren und Vorrichtung zur Härtung von radikalisch polymerisierbaren Beschichtungen
DE102004048005A1 (de) * 2004-10-01 2006-04-13 Dr. Hönle AG Gasentladungslampe, System und Verfahren zum Härten von durch UV-Licht härtbare Materialien sowie durch UV-Licht gehärtetes Material
US7638780B2 (en) * 2005-06-28 2009-12-29 Eastman Kodak Company UV cure equipment with combined light path
US8319199B2 (en) 2008-06-23 2012-11-27 Garcia Andrew Irradiation sources and methods
DE102008061597B4 (de) * 2008-12-11 2021-06-24 Venjakob Maschinenbau Gmbh & Co. Kg UV-Bestrahlungsvorrichtung
GB2531319A (en) * 2014-10-16 2016-04-20 Apollo Uv Ltd UV lamp unit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4563589A (en) * 1984-01-09 1986-01-07 Scheffer Herbert D Ultraviolet curing lamp device
US5667850A (en) * 1996-10-04 1997-09-16 Gavenco, Llc Method of curing with ultraviolet radiation on substrates requiring low heat

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048490A (en) 1976-06-11 1977-09-13 Union Carbide Corporation Apparatus for delivering relatively cold UV to a substrate
CH660489A5 (de) 1984-08-31 1987-04-30 Bernhard Glaus Verfahren und vorrichtung zum aushaerten polymerisierbarer beschichtungsmassen auf nicht textilen substraten.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4563589A (en) * 1984-01-09 1986-01-07 Scheffer Herbert D Ultraviolet curing lamp device
US5667850A (en) * 1996-10-04 1997-09-16 Gavenco, Llc Method of curing with ultraviolet radiation on substrates requiring low heat

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106000827A (zh) * 2016-06-08 2016-10-12 宜兴市富胜机械有限公司 一种单灯箱uv固化机

Also Published As

Publication number Publication date
US20030039711A1 (en) 2003-02-27
US6599585B2 (en) 2003-07-29

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